| Grant number: | 15/20689-9 |
| Support Opportunities: | Research Grants - Young Investigators Grants |
| Start date: | February 01, 2016 |
| End date: | July 31, 2020 |
| Field of knowledge: | Physical Sciences and Mathematics - Physics - Elementary Particle Physics and Fields |
| Principal Investigator: | Diogo Rodrigues Boito |
| Grantee: | Diogo Rodrigues Boito |
| Host Institution: | Instituto de Física de São Carlos (IFSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil |
| Associated research grant(s): | 21/06756-6 - Testing the standard model: precision QCD and muon g-2,
AP.JP2 18/14967-4 - High-precision determination of the charm and bottom quark masses, AP.R SPRINT |
| Associated scholarship(s): | 19/16957-9 - Precise determination of the C quark mass,
BP.MS 18/21050-0 - Higher-order QCD in the Higgs decay to bottom quarks, BP.MS 18/20982-6 - Asymptotic freedom in the cross section for electron-positron in hadrons, BP.IC + associated scholarships - associated scholarships |
Abstract
The precise knowledge of fundamental Quantum Chromodynamics (QCD) parameters is essential to precision calculations in particle physics. Several of them can be determined through the sound theoretical description of hadronic tau decays combined with experimental data obtained at LEP (CERN). In 2014, the group responsible for the ALEPH data published a re-analysis of the data for hadronic tau decays. The first goal of this research project is to refine the determination of alpha_s --- the strong coupling --- combining the recent theoretical developments with the data sets from ALEPH and OPAL collaborations. Other aspects of the theoretical description will also be assessed, e.g., low-energy constants, the contribution of condensates, and violations of quark-hadron duality. In our work, it will also be important to investigate more fundamental theoretical aspects of perturbative QCD, such as the use of the renormalization group. In parallel, other research lines, linked to LHC physics should also be explored. First, the precise theoretical description of hadronic interactions in three body decays of D and B mesons. Finally, we should study experimental constraints on anomalous couplings of the Higgs boson in the context of the dimension 6 effective lagragian. This research project should contribute to establish Particle Physics Phenomenology as a research line at the IFSC-USP. (AU)
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